| 时变软阈值法在纳秒脉冲信号去噪中的应用 |
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| 引用本文： | 潘洋,严萍,袁伟群.时变软阈值法在纳秒脉冲信号去噪中的应用[J].强激光与粒子束,2005,17(5):770-774. |
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| 作者姓名： | 潘洋 严萍 袁伟群 |
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| 作者单位： | 1.中国科学院 电工研究所，北京 100080； 2．中国科学院 研究生院，北京 100039 |
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| 基金项目： | 国家863计划项目资助课题，国家自然科学基金项目资助课题(50207011) |
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| 摘 要： | 对工程上常用的几种小波进行了分析，通过比较选定双正交小波为纳秒脉冲信号分析的母波，根据纳秒脉冲放电时产生的电磁干扰的特点提出基于多尺度分析的时变软阈值法，并对纳秒脉冲信号进行去噪处理。用Matlab自带的doppler波形和方波发生器产生的上升沿小于1 ns的方波对此方法进行检验，结果表明时变软阈值法明显优于传统的固定软阈值法。
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| 关 键 词： | 脉冲功率 信号去噪 小波变换 固定阈值法时变软阈值法 |
| 文章编号： | 1001-4322(2005)05-0770-05 |
| 收稿时间： | 2004/8/3 |
| 修稿时间： | 2004年8月3日 |
Application of time-variant soft threshold method in denoising nanosecond pulse signal |
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| PAN Yang,YAN Ping,YUAN Wei-qun.Application of time-variant soft threshold method in denoising nanosecond pulse signal[J].High Power Laser and Particle Beams,2005,17(5):770-774. |
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| Authors: | PAN Yang YAN Ping YUAN Wei-qun |
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| Institution: | 1. Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100080, China;2. Graduate School of Chinese Academy of Sciences, Beijing 100039, China |
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| Abstract: | Based on the comparison of several commonly used wavelets in the engineering, biorthogonal wavelet is considered to be the most suitable mother wavelet for the nanosecond pulse analysis. A time variant soft threshold is proposed in the signal denoising on the basis of the characteristic of the noise. A Doppler wave in Matlab and a square pulse generated by square wave generator are chosen to validate the effect of the method. The results prove that the time-variant soft threshold method proposed in this paper is better than the traditionally used threshold-fixed method. |
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| Keywords: | Pulse power Signal denoise Wavelet transform Threshold-fixed method Time-variant soft threshold method |
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